Originally Posted by Brookster123
That's what's in mine.. better yet.. just get a jar of seachem matrix. .
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Thanks ... I am going to place an order for some of the Fluval ceramic rings indicated above.
BTW: I still have about a third of "jar" of Seachem Matrix and there is some of it in both my C3's, the chemical chamber of my C4 (along with 2 Purigens), and a bag of it in my AC50. Problem is the size of many of the "rocks" is just too big for the C3 tray to get maximum surface area and I had to pick out only "smaller rocks" to add to the factory C-Nodes.